Abstract:

Perovskite-type mixed oxides LaFeO₃ and SrFeO₃ are prepared by citric acid complex method. It is used in catalytic degradation of water soluble dyesas catalyst. The results show that perovskite-type LaFeO₃ and SrFeO₃ have high catalytic beharior, but the catalytic beharior of SrFeO₃ is hig her than that of LaFeO₃, which is mainly related to the species of Asiteions. Aions not only change the valence and electric structure of Bions,but also have effect on the combination energy of A-O、B-O??

Key words: perovskite-type mix edoxide, LaFeO₃, SrFeO₃, catalytic degradation, oxygen vacancies

摘要：

采用柠檬酸络合法合成了钙钛矿型复合氧化物LaFeO3 和SrFeO3,并以其为催化剂对几种水溶性染料溶液进行降解实验。结果表明 ,LaFeO3 和SrFeO3 均有较强的催化性能 ,且SrFeO3 的催化活性明显高于LaFeO3。这主要与A位离子的种类有关 ,A位离子不仅改变了B位离子的价态和电子结构 ,同时还影响到A—O、B—O之间的结合能。

关键词: 钙钛矿型复合氧化物, LaFeO₃, SrFeO₃, 催化降解, 氧空位

CLC Number: 

• X788